Characteristics of patients with and without hyponatraemia
| Characteristics | Normal sodium | Patients (n) | Hyponatraemia | Patients (n) | p Value |
|---|---|---|---|---|---|
| Age (years) | 47.2±21.7 | 78 | 33.5±19.1 | 91 | <0.001 |
| Male (%) | 37 (47.4) | 78 | 53 (58.2) | 91 | 0.160 |
| Time under the ruins (h) | 30.2±28.9 | 62 | 27.5±25.1 | 83 | 0.834 |
| Urinary volume (ml/24 h) | 889.7±738.1 | 69 | 619.6±704.3 | 78 | 0.004 |
| ISS | 11.2±7.0 | 78 | 12.7±10.2 | 91 | 0.381 |
| Systolic blood pressure (mm Hg) | 119.8±32.9 | 78 | 115.6±30.2 | 89 | 0.797 |
| Diastolic blood pressure (mm Hg) | 71.8±18.8 | 78 | 71.0±19.3 | 89 | 0.986 |
| Haemoglobin (g/l) | 105.2±35.4 | 76 | 109.3±38.7 | 87 | 0.520 |
| WBC count (109/l) | 13.0±6.6 | 77 | 13.8±6.3 | 87 | 0.155 |
| Platelets (109/l) | 114.4±65.0 | 77 | 124.1±62.0 | 87 | 0.328 |
| Serum albumin (g/l) | 27.7±8.3 | 70 | 26.3±6.4 | 78 | 0.641 |
| Serum creatinine (mg/dl) | 2.8±1.8 | 78 | 4.3±2.5 | 91 | <0.001 |
| Blood urea nitrogen (mg/dl) | 49.6±25.2 | 78 | 68.6±31.6 | 91 | <0.001 |
| Serum potassium (mmol/l) | 4.8±1.3 | 78 | 5.7±1.3 | 91 | <0.001 |
| Serum phosphorus (mmol/l) | 1.6±0.8 | 67 | 2.2±0.8 | 74 | <0.001 |
| Serum calcium (mmol/l) | 2.1±0.2 | 71 | 2.0±0.3 | 81 | 0.002 |
| Serum uric acid (μmmol/l) | 480.9±222.8 | 73 | 556.6±237.2 | 85 | 0.040 |
| Creatinine kinase (U/l) | 20395.6±50660.4 | 34 | 81083.3±229550.7 | 42 | 0.006 |
ISS, Injury Severity Score; WBC, white blood cell.